Bardic Virtue(Virtue of Cunning) - Once per round, when an enemy attack misses an ally within 10 squares, you can slide that ally 1 square as a free action. (Bell will use this if she can move an ally into flanking, or a ranged ally out of melee)

Insightful Warning (Encounter Immediate Interrupt )
Trigger: A creature you can see makes an attack roll for an area or a close attack that includes Bell as a target.
Effect: Bell and each ally included as a target of the triggering attack gain a +2 power bonus to all defenses against it.

And now enter my action of marking the dwarf. If the dwarf fall before Jarel-karn action, simply move him to R7 and mark the creature that have activated. He would have used Ligthning Lure, but with his previous attack roll, he would ahve missed anyway.

Critical: +1d6 damage per plus, and the target takes the weaponĺs enhancement bonus as a penalty to defenses and checks until the end of your next turn.
Power (Daily ✦ Fear): Free Action. Use this power when you hit with this weapon. The target takes the weaponĺs enhancement bonus as a penalty to defenses and checks until the end of your next turn.